Bontoc weather in September

In September, Bontoc sees average daytime highs of 24°C and overnight lows near 17°C, with 356 mm of rain across 27.4 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Bontoc's 10th-clearest and 9th-windiest month. For the whole year in context, see Bontoc's year-round climate.

Daytime high
24°
6th warmest
Overnight low
17°
10th coldest
Rainfall
356 mm
27.4 wet days
Daylight
12 h 06 min
5:48 AM – 5:53 PM
Cloud cover
88%
10th clearest
Wind
4 km/h
9th windiest
Solar energy
4.52 kWh/m²
Travel score
3.9
out of 10

Bontoc is municipality of the Philippines and capital of the Mountain Province.

Density
59/km²
people per km²
Founded
1908

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical September day in Bontoc reaches about 24°C in the afternoon and slips back to 17°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 26°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12417
22417
32417
42417
52417
62417
72417
82417
92417
102417
112417
122417
132417
142417
152417
162417
172417
182417
192417
202417
212417
222417
232417
242417
252417
262417
272417
282417
292417
302417

Bontoc weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 13°6412.911.15.8
Feb22° / 14°6212.311.46.0
Mar23° / 15°8514.411.96.2
Apr25° / 16°11916.212.45.8
May25° / 17°33423.412.84.6
Jun25° / 17°33424.8134.2
Jul25° / 17°46528.312.93.8
Aug24° / 17°46129.212.63.7
Sep24° / 17°35627.412.13.9
Oct23° / 16°26520.711.64.9
Nov22° / 15°15116.711.25.4
Dec21° / 14°14217.1115.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 90%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2694
3694
4793
5793
6793
7793
8793
9793
10892
11892
12892
13892
14991
15991
161090
171090
181090
191090
201189
211189
221189
231288
241288
251387
261387
271486
281486
291486
301684

Chance of precipitation in September

Any precipitation

Bontoc gets around 356 mm of rain over 27.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 90% and peaks near 93% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
193
293
393
493
593
693
793
893
993
1093
1193
1293
1393
1492
1592
1692
1791
1891
1991
2090
2190
2289
2389
2488
2587
2686
2785
2884
2983
3082

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 39% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)
105446
205545
305644
405743
505743
605842
705941
805941
905941
1006040
1106040
1206139
1306139
1406238
1506238
1606238
1706238
1806337
1906337
2006337
2116237
2216237
2316237
2416336
2516336
2616435
2716534
2816534
2916633
3016732

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:46 AM to 5:49 AM, and sunset from 6:06 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:466:06
212.35:466:05
312.35:466:04
412.35:466:04
512.35:466:03
612.35:466:02
712.25:466:01
812.25:476:00
912.25:475:59
1012.25:475:58
1112.25:475:58
1212.25:475:57
1312.15:475:56
1412.15:475:55
1512.15:475:54
1612.15:485:53
1712.15:485:52
1812.15:485:52
1912.05:485:51
2012.05:485:50
2112.05:485:49
2212.05:485:48
2312.05:485:47
2412.05:495:46
2511.95:495:46
2611.95:495:45
2711.95:495:44
2811.95:495:43
2911.95:495:42
3011.95:495:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.52 kWh/m².

For context, solar energy here swings from a low near 3.44 kWh/m² to a high of 5.98 kWh/m² in April across the year — September's 4.52 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Bontoc

In seasonPeak

In September, Bontoc sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Bontoc sits in the Pacific typhoon belt; the season peaks July–October.

Bontoc's rainy season runs May–October, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Bontoc?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.9
Sightseeing
10th-best month of the year
3.4
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Bontoc.

What to pack for Bontoc in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Bontoc sees daytime highs around 24°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 27 days see rain.

rain gearlight clothessun protection

Sea temperature near Bontoc in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 64 km away) is warmest in June at about 30°C and coldest in February near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar28Warm
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Bontoc in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bontoc peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 18UV 14Dec 13UV 8
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Bontoc in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Bontoc is worst in March — around 16 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2416 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar16Moderate
Apr16Moderate
May11Good
Jun10Good
Jul9Good
Aug10Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Bontoc?

Bontoc sits at 17.1°N, 121.0°E, 864 m above sea level, in Philippines. The nearest listed city is Banaue, 21 km away.

Topography around Bontoc

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bontoc.

Within 3 km, the terrain around Bontoc has large variations in elevation — a maximum elevation change of 821 m around an average of 1,111 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,071 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,898 m.

The land around Bontoc is covered by trees (75%) within 3 km, trees (87%) within 16 km, and trees (72%) within 80 km.

3 km
821 m
16 km
2,071 m
80 km
2,898 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Banaue 21 km · Mankayan 32 km · Lagawe 35 km · Diadi 57 km · Santa Maria 59 km · Tagudin 59 km · Solano 67 km · Tabuk 68 km

Philippines travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 60 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$4,171
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
48%
of population, 2024
Homicide rate
4.3
per 100k, 2023
Road deaths
12
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 569
Religion
Roman Catholic 79%other 8%Muslim 6%other Christian 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bontoc (17.0873°, 120.9768°, elevation 864 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).